@16:33 " I am not a scientist...." -I beg to differ, very logical approach and your conclusion about what is wrong with the FPR is highly likely correct. Thanks for the ride, I learned a lot, as always.
Great video. Could it have been the resistance at the connectors? I have had to replace multiple connectors on my 2007 Audi S6. They were the connectors at the throttle bodies, but could it be the same issue? I’m curious how an intermittent connector issue is diagnosed.
Long time no see. Glad to see you. Awesome work as usual. What Power Probe is that? 4? I'm not sure I understand what you described about it correctly... Does is somehow calculate what the resistance should be and match it or do you need to know what resistance should be used and set it yourself?
Yes, looks like the computer is limiting the full ground as you can see that it is very capable of grounding it fully. An amp test would have shown us that.
OM654 MRD1 wastegate driver failed and I put a load on the circuit with same resistance as the wastegate valve and commanded it from the scanner got just 2.3 V at 100% PWM command.
It means the power going in a coil for example is not going fully out to ground. This can be caused by high resistance in the coil...in general this can be caused by a high resistance (in a wire, in a coil, in a sensor) or an open/broken ground can cause the same issue
@@Sean_DiagnosticsI don’t follow you on that either. Why would the ground care what the resistance in the coil is. Either it is a good ground or there could be resistance after the load all the way to the battery ground. Is that correct ? Not trying to outsmart you. I’ve been retired 8 yrs after 50 as a car tech. I enjoy all these electrical diagnostic videos. Also trying a used ecm is a guess which he said he’s not being paid to guess. I worked at Subaru dealer 14 of my first 50 yrs. Using parts off new cars on the lot was very common. Aka substitute a known good unit scenario. We had no anti theft programming to worry about back then so it was really easy. Just want to understand this properly. Any insight you give is much appreciated. I own three lab scopes though they are out of date by today’s standards I imagine.
That doesnt make much sense to me, if there was no voltage divider, voltage drop as in a resistor series (bad ground or resistance to ground). How could it elevate the ground. Does the transistor not open fully? May it be that?
Just like voltage drop can cause lower voltage, resistance in the ground circuit can cause the ground to be elevated. We’ve always accepted as a general threshold people to drop on the positive side of 500mV, and a voltage drop on the ground side of 100mV. The resistance in the ground circuit causes the ground level to be elevated since it’s connected in the same circuit where there’s battery voltage on the opposing side of the load
Correct. The fuel pump regulator resistance was out of specification, causing increased current consumption against a transistor that isn’t designed to handle as much current
@@SuperMarioDiagnostics. Ok. I think I understand. Less resistance. Higher amps then the driver transistor inside the ecm is designed to handle ? Do you think they are protected against excess current ? Unlike GM computers of the 80’s which failed constantly from excess amps due to shorted coils !
@@dharley189 i do, but only so much. On this year, I don’t think there are as much protections as late model vehicles where the module will actively disable the circuit
I'm definitely logging back to the SD premium channel. Missing your videos, bro. I'm glad that you showed us this one.
Good stuff as always bro... Thanks Mario
@16:33 " I am not a scientist...." -I beg to differ, very logical approach and your conclusion about what is wrong with the FPR is highly likely correct. Thanks for the ride, I learned a lot, as always.
Great work Mario 👍
Good video Mario is that the new topdon phoenix is that autodater software or all dater 😊
Very unusual looking FRP waveform Mario. Nice case study. Thank you!
Nice one Mario 👍
Good job, partner… as usual…
You happen to test the resistance between the old and new pumps? Would be curious to
Could you have tested resistance across pump the pump? Any guided test for ohm spec?
Excellent video Brother - what make/model is that little pico scope?
Thanks you Mario for other language tracks
Very nice video! This definitely will help diagnosing pwm controlled circuits
Thats a nice feature on the PP. Great work Mario!
Great job and thanks for sharing the processes Mario.
Well done Mario top content
And great approach
What version of power probe is that ?
Great work Mario
premium material this one. she was a fun one 😊😊👍👍
Thanks for sharing Mario!!
Great job and thanks
Hell yeah , thank you, Mario . So, do you trust the power probe driver test ? I've always wondered .
Very interesting issue with that pressure regulator! Thank you!
That is a neat scope case with BNC connector. Can you please share who makes it?
It looks like the case from jarhead diagnostics
Jarhead Diagnostics
nice work MARIO!!!!!!!
Superb diag, Mario! 👍🏼
Great video. Could it have been the resistance at the connectors? I have had to replace multiple connectors on my 2007 Audi S6. They were the connectors at the throttle bodies, but could it be the same issue? I’m curious how an intermittent connector issue is diagnosed.
Long time no see. Glad to see you. Awesome work as usual.
What Power Probe is that? 4?
I'm not sure I understand what you described about it correctly... Does is somehow calculate what the resistance should be and match it or do you need to know what resistance should be used and set it yourself?
It calculates what the resistance should be and then automatically matches it for you
thanks👍
Very informative video. Would an ohm test, or amp draw reveal and anomalies on that pressure regulator?
Yes, looks like the computer is limiting the full ground as you can see that it is very capable of grounding it fully. An amp test would have shown us that.
OM654 MRD1 wastegate driver failed and I put a load on the circuit with same resistance as the wastegate valve and commanded it from the scanner got just 2.3 V at 100% PWM command.
Nice job
What brand is the green back probe?
going with we don't have the spare ecu at disposal, could you put in a replacement load and see ok the ground can be supplied well
Can I use a suitable resistor instead of the power probe?
Mario whats the scope you were using? What brand is it?
I don't quite understand what an elevated ground is. Does that mean there is slight voltage on the ground wire coming from ECU?
It means the power going in a coil for example is not going fully out to ground. This can be caused by high resistance in the coil...in general this can be caused by a high resistance (in a wire, in a coil, in a sensor) or an open/broken ground can cause the same issue
@@Sean_DiagnosticsSean, I assume hooking up an amp clamp to the scope would tell us whats going on in the sensor?
@@Sean_DiagnosticsI don’t follow you on that either. Why would the ground care what the resistance in the coil is. Either it is a good ground or there could be resistance after the load all the way to the battery ground. Is that correct ?
Not trying to outsmart you. I’ve been retired 8 yrs after 50 as a car tech. I enjoy all these electrical diagnostic videos.
Also trying a used ecm is a guess which he said he’s not being paid to guess. I worked at Subaru dealer 14 of my first 50 yrs. Using parts off new cars on the lot was very common. Aka substitute a known good unit scenario. We had no anti theft programming to worry about back then so it was really easy.
Just want to understand this properly. Any insight you give is much appreciated. I own three lab scopes though they are out of date by today’s standards I imagine.
Damn, is that a 3d printed u-scope case?
That doesnt make much sense to me, if there was no voltage divider, voltage drop as in a resistor series (bad ground or resistance to ground). How could it elevate the ground. Does the transistor not open fully? May it be that?
Just like voltage drop can cause lower voltage, resistance in the ground circuit can cause the ground to be elevated. We’ve always accepted as a general threshold people to drop on the positive side of 500mV, and a voltage drop on the ground side of 100mV.
The resistance in the ground circuit causes the ground level to be elevated since it’s connected in the same circuit where there’s battery voltage on the opposing side of the load
@ i get that, but there was no resistance in series right here
Correct. The fuel pump regulator resistance was out of specification, causing increased current consumption against a transistor that isn’t designed to handle as much current
@@SuperMarioDiagnostics. Ok. I think I understand. Less resistance. Higher amps then the driver transistor inside the ecm is designed to handle ? Do you think they are protected against excess current ? Unlike GM computers of the 80’s which failed constantly from excess amps due to shorted coils !
@@dharley189 i do, but only so much. On this year, I don’t think there are as much protections as late model vehicles where the module will actively disable the circuit
idol master,okay lang ba, pwede akin nalang yan ng yung mga luma mong scanner para makinabangan naman💯💯💯
Mario increase frequency upload stuff )